CVE-2018-17256

Name: CVE-2018-17256
Creator: NVD / NIST
Published: 2018-11-27T19:29:00.197+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.65%

Last modified Jun 17, 2026

CVE-2018-17256 is a vulnerability of currently unknown severity. Persistent cross-site scripting (XSS) vulnerability in Umbraco CMS 7.12.3 allows authenticated users to inject arbitrary web script via the Header Name of a content (Blog, Content Page, etc.). The vulnerability is exploited when updating or removing public access of a content.. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

Persistent cross-site scripting (XSS) vulnerability in Umbraco CMS 7.12.3 allows authenticated users to inject arbitrary web script via the Header Name of a content (Blog, Content Page, etc.). The vulnerability is exploited when updating or removing public access of a content.

Metrics

EPSS Probability

0.65%

46.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Umbraco	Umbraco Cms	7.12.3

References

https://www.cspcert.ph/advisories/2018/CVE-2018-17256.htmlThird Party Advisory
https://www.cspcert.ph/advisories/2018/CVE-2018-17256.htmlThird Party Advisory

Timeline

Published: Nov 27, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-17256?

How severe is CVE-2018-17256?

Severity scoring for CVE-2018-17256 is pending analysis. The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2018-17256?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-17256?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST